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Linux Foundation CKS Exam Overview:
| Certification Vendor: | The Linux Foundation |
|---|---|
| Exam Name: | Certified Kubernetes Security Specialist |
| Exam Number: | CKS |
| Exam Format: | Performance-based hands-on command line tasks |
| Passing Score: | 66% |
| Real Exam Qty: | 15-20 |
| Available Languages: | English |
| Exam Price: | $395 USD |
| Related Certifications: | CKA (Certified Kubernetes Administrator) |
| Exam Duration: | 120 minutes |
| Certificate Validity Period: | 2 years |
| Sample Questions: |  |
| Exam Way: | Online proctored exam (remote) or at a testing center |
| Pre Condition: | CKA (Certified Kubernetes Administrator) certification is required before taking CKS |
| Official Syllabus URL: | https://training.linuxfoundation.org/certification/certified-kubernetes-security-specialist/ |
Linux Foundation CKS Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| System Hardening | 15% | - Kernel defaults and parameters using sysctl - Understand the concept of OPA (Open Policy Agent) and Gatekeeper - Modify host components to improve security - Enable audit logging |
| Minimize Microservice Vulnerabilities | 20% | - Use AppArmor or seccomp profiles to constrain container behavior - Set appropriate security contexts for pods and containers - Understand the principle of immutable containers - Configure network policies for namespace isolation - Use PSP to enforce security controls - Use OPA Gatekeeper to enforce security controls |
| Cluster Hardening | 15% | - Minimize admission of containers with sharing the host IPC namespace - Minimize admission of privileged containers - Minimize admission of containers with hostPath volumes - Minimize admission of containers without seccomp profiles - Minimize admission of containers with added capabilities - Minimize admission of containers without a security context - Minimize admission of containers with sharing the host process namespace - Minimize admission of containers with capabilities assigned - Minimize admission of containers with FlexVolume volumes - Minimize admission of containers that allow host namespaces - Minimize admission of containers with raw block devices - Minimize admission of containers with allowPrivilegeEscalation - Minimize admission of containers with sharing the host network namespace - Minimize admission of containers without AppArmor profile |
| Cluster Setup | 10% | - Understand the security implications of embedding cloud provider flags - Configure TLS certificates and minimum version for etcd - Use Pod Security Policies to control security-related pod behaviors - Manage sensitive information in clusters - Implement Pod-to-Pod encryption using mTLS or WireGuard - Use role-based access control (RBAC) to minimize exposure - Use Cis benchmarks to check Kubernetes cluster settings |
| Supply Chain Security | 20% | - Use static analysis tools to detect vulnerabilities - Sign container images and verify signatures - Use image admission controllers to prevent use of untrusted images - Understand the software supply chain best practices - Understand image security scanning and its workflow - Understand the container build process - Use distroless images for static workload - Minimize base image footprint |
| Monitoring, Logging, and Runtime Security | 20% | - Minimize the attack surface using container health indicators - Audit and detect logs and events for anomalies - Falco - container security monitoring and threat detection - Understand and monitor network traffic - Detect threats at the container level - Perform behavioral analytics to detect malicious activity |
Common Questions About the Linux Foundation CKS Exam
The CKS exam, officially known as Linux Foundation Certified Kubernetes Security Specialist (CKS), is the Linux Foundation test that leads to the Kubernetes Security Specialist certification at the Expert level. Passing it validates the skills employers expect from a certified professional. It is also associated with related credentials such as CKA (Certified Kubernetes Administrator).
The CKS exam contains 15-20 questions, and you have 120 minutes to complete them. Work out your per-question pace before test day, and flag slow items instead of stalling on them — time pressure, not knowledge, sinks many first attempts. Timed mock exams in the Actual4Exams test engines are the most reliable way to build that rhythm.
The passing score for the CKS exam is 66%, and the official registration fee is $395 USD. If you miss the mark, a retake means paying the full fee again, so book your seat only when you are ready. A practical benchmark: score consistently above the passing line on timed practice tests before scheduling the real exam.
CKA (Certified Kubernetes Administrator) certification is required before taking CKS
Entry requirements can change, so confirm the latest conditions on the official exam page: https://training.linuxfoundation.org/certification/certified-kubernetes-security-specialist/.
Yes. A free PDF demo of the Linux Foundation Certified Kubernetes Security Specialist (CKS) questions is available, so you can check the question style and answer quality before you pay. Every purchase also includes 365 days of free updates, and if the product expires you can renew the update service at a 50% discount from your member zone.
If you take the corresponding CKS exam within 60 days of purchase and do not pass, you can apply for a full refund under the 100% Money Back Guarantee: submit a scan of your enrollment slip and your official Score Report (PDF) within 2 days of the exam date, and the claim is processed within 7 days. Attempts made within 3 days of purchase, downloads without an actual exam attempt, free materials, and expired orders are not eligible, and the candidate name must match the payer name. Prefer new material instead of a refund? You can exchange your purchase for two free products of equal value and keep the update service on your original product. As for delivery, the files are available for instant download and are also emailed to you within one minute of payment — if nothing arrives within 2 hours, contact customer service. There is no limit on how many computers you can install the product on.
The official Linux Foundation Certified Kubernetes Security Specialist (CKS) outline is organized into 6 domains. The first three are:
- Cluster Hardening — 15% of the exam
- System Hardening — 15% of the exam
- Cluster Setup — 10% of the exam
See the complete exam topics section above for the full outline and the weighting of every domain.
Linux Foundation Certified Kubernetes Security Specialist (CKS) Sample Questions:
Question 1
SIMULATION
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context dev
Context:
A CIS Benchmark tool was run against the kubeadm created cluster and found multiple issues that must be addressed.
Task:
Fix all issues via configuration and restart the affected components to ensure the new settings take effect.
Fix all of the following violations that were found against the API server:
1.2.7 authorization-mode argument is not set to AlwaysAllow FAIL
1.2.8 authorization-mode argument includes Node FAIL
1.2.7 authorization-mode argument includes RBAC FAIL
Fix all of the following violations that were found against the Kubelet:
4.2.1 Ensure that the anonymous-auth argument is set to false FAIL
4.2.2 authorization-mode argument is not set to AlwaysAllow FAIL (Use Webhook autumn/authz where possible) Fix all of the following violations that were found against etcd:
2.2 Ensure that the client-cert-auth argument is set to true
Question 2
SIMULATION
Context
You must resolve issues that a CIS Benchmark tool found for the kubeadm provisioned cluster.
Task
Fix all issues via configuration and restart the affected components to ensure the new settings take effect.
Fix all of the following violations that were found against the kubelet:
The cluster uses the Docker Engine os its container runtime, If needed, use the docker command to troubleshaot running containers.
Ensure that the anonymous-auth argument is set to false FAIL
Ensure that the -authorization-mode argument is not set to FAIL
AlwaysAllow
Use Webhook authentication /authorization where possible.
Fix all of the following violations that were found against ettd :
Ensure that the -client cert auth argument is set to true FAIL
Question 3
SIMULATION
Service is running on port 389 inside the system, find the process-id of the process, and stores the names of all the open-files inside the /candidate/KH77539/files.txt, and also delete the binary.
Question 4
SIMULATION
Documentation dockerd
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh cks000037
Task
Perform the following tasks to secure the cluster node cks000037 :
Remove user developer from the docker group.
Do not remove the user from any other group.
Reconfigure and restart the Docker daemon to ensure that the socket
file located at /var/run/docker.sock is owned by the group root.
Re-configure and restart the Docker daemon to ensure it does not listen on any TCP port.
After completing your work, ensure the Kubernetes cluster is healthy.
Question 5
SIMULATION
Documentation
ServiceAccount, Deployment,
Projected Volumes
You must connect to the correct host . Failure to do so may
result in a zero score.
[candidate@base] $ ssh cks000033
Context
A security audit has identified a Deployment improperly handling service account tokens, which could lead to security vulnerabilities.
Task
First, modify the existing ServiceAccount stats-monitor-sa in the namespace monitoring to turn off automounting of API credentials.
Next, modify the existing Deployment stats-monitor in the namespace monitoring to inject a ServiceAccount token mounted at /var/run/secrets/kubernetes.io/serviceaccount/token.
Use a Projected Volume named token to inject the ServiceAccount token and ensure that it is mounted read-only.
The Deployment's manifest file can be found at /home/candidate/stats-monitor/deployment.yaml.
Solutions:
| Question 1 Answer: Only visible for members | Question 2 Answer: Only visible for members | Question 3 Answer: Only visible for members | Question 4 Answer: Only visible for members | Question 5 Answer: Only visible for members |
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We still understand the effort, time, and money you will invest in preparing for your certification exam, which makes failure in the Linux Foundation CKS exam really painful and disappointing. Although we cannot reduce your pain and disappointment but we can certainly share with you the financial loss.
This means that if due to any reason you are not able to pass the CKS actual exam even after using our product, we will reimburse the full amount you spent on our products. you just need to mail us your score report along with your account information to address listed below within 7 days after your unqualified certificate came out.
